CN111496402B - Frame longitudinal beam reverse deformation welding fixture and application method thereof - Google Patents
Frame longitudinal beam reverse deformation welding fixture and application method thereof Download PDFInfo
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- CN111496402B CN111496402B CN202010422876.0A CN202010422876A CN111496402B CN 111496402 B CN111496402 B CN 111496402B CN 202010422876 A CN202010422876 A CN 202010422876A CN 111496402 B CN111496402 B CN 111496402B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to the field of automobile manufacturing, and particularly relates to a frame longitudinal beam reverse deformation welding clamp and a use method thereof. The base height supplementing table is arranged on the clamp base, and the fixed clamping mechanism, the stretching clamping mechanism and the side pressure clamping mechanism are arranged on the clamp base or the base height supplementing table according to different positions. According to the invention, the deformation of the longitudinal beam after welding is avoided by arranging the reverse deformation of welding on the clamp. The welding deformation problem of the existing frame longitudinal beam can be solved, the rejection rate is reduced, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the field of automobile manufacturing, and particularly relates to a frame longitudinal beam reverse deformation welding fixture and a using method thereof.
Background
The CO2 gas shielded welding has the advantages of good welding quality, easy realization of automation and wide application in modern automobile manufacture, in particular to welding of frames. However, due to welding distortion, welding jigs are used during welding to ensure assembly and size of the parts. The longitudinal beam is the main body of the frame, and is easy to generate welding deformation in the welding process due to the large length, so that the accuracy of the frame is affected. The existing method is that after welding the longitudinal beam, correction or scrapping is carried out according to the deformation, the efficiency is low, and the rejection rate is high.
Disclosure of Invention
The invention aims to provide a frame longitudinal beam reverse deformation welding fixture, which realizes no deformation after welding of longitudinal beams by arranging the reverse deformation amount of welding on the fixture. The welding deformation problem of the existing frame longitudinal beam is solved, the rejection rate is reduced, and the production efficiency is improved.
In order to achieve the purpose of the invention, the technical scheme of the invention is as follows:
a frame longitudinal beam reverse deformation welding fixture comprises a fixture base, a fixed clamping mechanism, a stretching clamping mechanism, a side pressure clamping mechanism and a base height supplementing table. The base height supplementing table is arranged on the clamp base, and the fixed clamping mechanism, the stretching clamping mechanism and the side pressure clamping mechanism are arranged on the clamp base or the base height supplementing table according to different positions.
Further, when in use, the fixed clamping mechanism positions and clamps the frame longitudinal beam; clamping cylinders of the stretching and clamping mechanism clamp two ends of the longitudinal beam, and the stretching cylinder pulls the longitudinal beam downwards to a required position according to the reverse deformation; the side pressure clamping mechanism is used for fixing the longitudinal beam at the reverse deformation position and clamping the longitudinal beam. After the welding of the longitudinal beam is finished, the side pressure clamping mechanism is firstly opened, then the stretching cylinder of the stretching clamping mechanism is opened, then the clamping cylinder is opened, and finally the fixed clamping mechanism is opened. Because the longitudinal beams have the height difference, the base height compensating table is used for compensating the height difference of the longitudinal beams.
Further, the fixed clamping mechanism comprises a base, a supporting block, a pressing block, a rocker arm, a connecting rod and an air cylinder; the base and the clamp base are fixedly connected, the rocker arm is movably connected with the base, the supporting block is fixedly connected with the base, the pressing block is fixedly connected with the rocker arm, the air cylinder is movably connected with the rocker arm, and the connecting rod is simultaneously movably connected with the rocker arm and the air cylinder.
Further, during the use, the supporting shoe be used for supporting the longeron, when the piston rod round trip movement of cylinder, drive rocking arm and connecting rod and rotate simultaneously, thereby realize compressing tightly and opening of rocking arm.
Further, the stretching and clamping mechanism consists of a stretching mechanism and a pressing mechanism, and comprises a shaft sleeve, a mechanism mounting plate, a cylinder mounting plate, a guide pillar fixing plate, a support, a supporting block, a pressing block, a rocker arm, a connecting rod, a pressing cylinder, an upper limiting block, a lower limiting block, a guide pillar and a stretching cylinder;
the stretching mechanism mainly comprises: the mechanism mounting plate is connected with the clamp base or the base height supplementing table, the shaft sleeve and the cylinder mounting plate are both connected with the mechanism mounting plate, the stretching cylinder is connected with the cylinder mounting plate, the guide pillar is connected with the guide pillar fixing plate and is arranged in the shaft sleeve, the upper limiting block is connected with the guide pillar fixing plate, the lower limiting block is connected with the mechanism mounting plate, and the connections are all bolted connections;
the clamping machine mechanism mainly comprises: the rocker arm is movably connected with the support, the supporting block is fixedly connected with the support, the pressing block is fixedly connected with the rocker arm, the pressing cylinder is movably connected with the rocker arm, and the connecting rod is simultaneously movably connected with the rocker arm and the pressing cylinder.
The stretching mechanism and the clamping mechanism are fixedly connected with the guide post fixing plate through a support.
Furthermore, when in use, the clamping mechanism and the fixed clamping mechanism work in the same way; when the stretching mechanism moves back and forth through a piston rod of the stretching cylinder, the clamping mechanism is integrally pulled down or jacked up, the guide post ensures that the clamping mechanism moves linearly, and the stretching position of the clamping mechanism can be adjusted by the upper limiting block and the lower limiting block.
Further, the side pressure clamping mechanism comprises a mechanism mounting plate, a right connecting rod, a guide pillar fixing plate, a main body positioning plate, a right rocker arm, a right pressing block, a left rocker arm, a supporting block, a cylinder fixing plate, a cylinder, a left connecting rod and a movable block;
the mechanism mounting panel and anchor clamps base or base mend high platform fixed connection, main part locating plate and mechanism mounting panel fixed connection, cylinder fixed plate and guide pillar fixed plate and main part locating plate fixed connection, cylinder and cylinder fixed plate fixed connection, the both ends of guide pillar respectively with guide pillar fixed plate and mechanism mounting panel fixed connection, movable block and cylinder fixed connection, right connecting rod and left connecting rod simultaneously with movable block swing joint, the other end of right connecting rod and left connecting rod respectively with right rocking arm and left rocking arm swing joint, the middle part and the main part locating plate swing joint of right rocking arm and left rocking arm, right briquetting and left briquetting respectively with right rocking arm and left rocking arm fixed connection, supporting shoe and cylinder fixed plate fixed connection.
Further, during the use, the piston rod of cylinder when the back and forth movement, drive the up-and-down motion of movable block to make right connecting rod and left connecting rod follow the movable block motion, the motion of right connecting rod and left connecting rod drive right rocking arm and left rocking arm and rotate around the swing joint of rocking arm and main part locating plate, thereby realize opening and the clamp of rocking arm. The supporting blocks are used for supporting the longitudinal beams, and the rocker arms are mainly divided into a left rocker arm, a right rocker arm and a left rocker arm, so that the pressing blocks are closer to welding seams, and welding is facilitated.
According to the invention, the deformation of the longitudinal beam after welding is avoided by arranging the reverse deformation of welding on the clamp. The welding deformation problem of the existing frame longitudinal beam is solved, the rejection rate is reduced, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a fixing and clamping mechanism according to the present invention;
FIG. 3 is a schematic view of a tensile clamping mechanism according to the present invention;
FIG. 4 is a schematic diagram of a side pressure clamping mechanism according to the present invention;
reference numerals:
the clamping device comprises a 1-clamp base, a 2-fixed clamping mechanism, a 3-stretching clamping mechanism, a 4-side pressure clamping mechanism and a 5-base height supplementing table; 201-a base, 202-a supporting block, 203-a pressing block, 204-a rocker arm, 205-a connecting rod, 206-a cylinder, 301-a shaft sleeve, 302-a mechanism mounting plate, 303-a cylinder mounting plate, 304-a guide pillar fixing plate, 305-a support, 306-a supporting block, 307-a pressing block, 308-a rocker arm, 309-a connecting rod, 310-a pressing cylinder, 311-an upper limiting block, 312-a lower limiting block, 313-a guide pillar and 314-a stretching cylinder; 401-mechanism mounting plate, 402-right connecting rod, 403-guide pillar, 404-guide pillar fixing plate, 405-main body positioning plate, 406-right rocker arm, 407-right press block, 408-left press block, 409-left rocker arm, 410-supporting block, 411-cylinder fixing plate, 412-cylinder, 413-left connecting rod and 414-movable block.
Examples
Examples: see fig. 1-4.
As shown in fig. 1: a frame longitudinal beam reverse deformation welding fixture comprises a fixture base 1, a fixed clamping mechanism 2, a stretching clamping mechanism 3, a side pressure clamping mechanism 4 and a base height supplementing table 5. The base height supplementing table 5 is arranged on the clamp base 1, and the fixed clamping mechanism 2, the stretching clamping mechanism 3 and the side pressure clamping mechanism 4 are arranged on the clamp base 1 or the base height supplementing table 5 according to different positions.
The fixed clamping mechanism 2 is used for positioning and clamping the frame longitudinal beam; clamping cylinders of the stretching and clamping mechanism 3 clamp two ends of the longitudinal beam, and the stretching cylinders pull the longitudinal beam downwards to a required position according to the reverse deformation; the side press clamping mechanism 4 fixes and clamps the side members in the reverse deformation position. After the welding of the longitudinal beam is finished, the side pressure clamping mechanism 4 is opened, then the stretching cylinder of the stretching clamping mechanism 3 is opened, then the clamping cylinder is opened, and finally the fixed clamping mechanism 2 is opened. The base height compensating table 5 is used for compensating the height difference of the longitudinal beam due to the height difference of the longitudinal beam.
As shown in fig. 2: the base 201 is fixedly connected with the clamp base 1, the rocker arm 204 is movably connected with the base 201, the supporting block 202 is fixedly connected with the base 201, the pressing block 203 is fixedly connected with the rocker arm 204, the cylinder 206 is movably connected with the rocker arm 204, and the connecting rod 205 is simultaneously movably connected with the rocker arm 204 and the cylinder 206. The supporting block 202 is used for supporting a longitudinal beam, and when a piston rod of the air cylinder 206 moves back and forth, the rocker arm 204 and the connecting rod 205 are driven to rotate simultaneously, so that the compression and the opening of the rocker arm 204 are realized.
As shown in fig. 3: the stretching and clamping mechanism 3 is mainly divided into 2 sub-mechanisms: a stretching mechanism and a compacting mechanism. The stretching mechanism mainly comprises: the mechanism mounting plate 302 is connected with the fixture base 1 or the base height supplementing table 5, the shaft sleeve 301 and the cylinder mounting plate 303 are both connected with the mechanism mounting plate 302, the stretching cylinder 314 is connected with the cylinder mounting plate 303, the guide column 313 is connected with the guide column fixing plate 304 and is arranged in the shaft sleeve 301, the upper limiting block 311 is connected with the guide column fixing plate 304, the lower limiting block 312 is connected with the mechanism mounting plate 302, and the connections are all bolted connections. The clamping machine mechanism mainly comprises: the rocker arm 308 is movably connected with the support 305, the supporting block 306 is fixedly connected with the support 305, the pressing block 307 is fixedly connected with the rocker arm 308, the pressing cylinder 310 is movably connected with the rocker arm 308, and the connecting rod 309 is simultaneously movably connected with the rocker arm 308 and the pressing cylinder 310. The stretching mechanism and the clamping mechanism are fixedly connected with the guide post fixing plate 304 through the support 305.
The working mode of the clamping mechanism is the same as that of the fixed clamping mechanism 2; when the stretching mechanism moves back and forth through the piston rod of the stretching cylinder 314, the whole clamping mechanism is pulled down or jacked up, the guide post 313 ensures that the clamping mechanism moves linearly, and the stretching positions of the clamping mechanism can be adjusted by the upper limiting block 311 and the lower limiting block 312.
As shown in fig. 4: the mechanism mounting plate 401 is fixedly connected with the fixture base 1 or the base height supplementing table 5, the main body positioning plate 405 is fixedly connected with the mechanism mounting plate 401, the air cylinder fixing plate 411 and the guide pillar fixing plate 404 are fixedly connected with the main body positioning plate 405, the air cylinder 412 is fixedly connected with the air cylinder fixing plate 411, two ends of the guide pillar 403 are respectively fixedly connected with the guide pillar fixing plate 404 and the mechanism mounting plate 401, the movable block 414 is fixedly connected with the air cylinder 412, the right connecting rod 402 and the left connecting rod 413 are simultaneously movably connected with the movable block 414, the other ends of the right connecting rod 402 and the left connecting rod 413 are respectively movably connected with the right rocker arm 406 and the left rocker arm 409, the middle parts of the right rocker arm 406 and the left rocker arm 409 are movably connected with the main body positioning plate 405, the right pressing block 407 and the left pressing block 408 are respectively fixedly connected with the right rocker arm 406 and the left rocker arm 409, and the supporting block 410 is fixedly connected with the air cylinder fixing plate 411.
When the piston rod of the air cylinder 412 moves back and forth, the movable block 414 is driven to move up and down, so that the right connecting rod 402 and the left connecting rod 413 move along with the movable block, and the movement of the right connecting rod 402 and the left connecting rod 413 drives the right rocker arm 406 and the left rocker arm 409 to rotate around the movable connection point of the rocker arm and the main body positioning plate 405, thereby realizing the opening and clamping of the rocker arm. The supporting blocks 410 are used for supporting the longitudinal beams, and the rocker arms are mainly used for enabling the pressing blocks to be closer to welding seams so as to facilitate welding.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.
Claims (6)
1. The utility model provides a frame longeron reverse deformation welding jig which characterized in that: comprises a clamp base (1), a fixed clamping mechanism (2), a stretching clamping mechanism (3), a side pressure clamping mechanism (4) and a base height supplementing table (5); the base height supplementing table (5) is arranged on the clamp base (1), and the fixed clamping mechanism (2), the stretching clamping mechanism (3) and the side pressure clamping mechanism (4) are arranged on the clamp base (1) or the base height supplementing table (5) according to the position requirements;
the stretching and clamping mechanism (3) is composed of a stretching mechanism and a pressing mechanism and comprises a shaft sleeve (301), a mechanism mounting plate (302), a cylinder mounting plate (303), a guide pillar fixing plate (304), a support (305), a supporting block (306), a pressing block (307), a rocker arm (308), a connecting rod (309), a pressing cylinder (310), an upper limiting block (311), a lower limiting block (312), a guide pillar (313) and a stretching cylinder (314);
the stretching mechanism comprises: the mechanism mounting plate (302) is connected with the clamp base (1) or the base height supplementing table (5), the shaft sleeve (301) and the air cylinder mounting plate (303) are connected with the mechanism mounting plate (302), the stretching air cylinder (314) is connected with the air cylinder mounting plate (303), the guide pillar (313) is connected with the guide pillar fixing plate (304) and is arranged in the shaft sleeve (301), the upper limiting block (311) is connected with the guide pillar fixing plate (304), the lower limiting block (312) is connected with the mechanism mounting plate (302), and the connections are all bolted connections;
a clamping machine mechanism: the rocker arm (308) is movably connected with the support (305), the supporting block (306) is fixedly connected with the support (305), the pressing block (307) is fixedly connected with the rocker arm (308), the pressing cylinder (310) is movably connected with the rocker arm (308), and the connecting rod (309) is simultaneously movably connected with the rocker arm (308) and the pressing cylinder (310); the stretching mechanism and the clamping mechanism are fixedly connected with the guide pillar fixing plate (304) through a support (305);
the side pressure clamping mechanism (4) comprises a mechanism mounting plate (401), a right connecting rod (402), a guide pillar (403), a guide pillar fixing plate (404), a main body positioning plate (405), a right rocker arm (406), a right press block (407), a left press block (408), a left rocker arm (409), a supporting block (410), a cylinder fixing plate (411), a cylinder (412), a left connecting rod (413) and a movable block (414);
mechanism mounting panel (401) and anchor clamps base (1) or base mend high platform (5) fixed connection, main part locating plate (405) and mechanism mounting panel (401) fixed connection, cylinder fixed plate (411) and guide pillar fixed plate (404) and main part locating plate (405) fixed connection, cylinder (412) and cylinder fixed plate (411) fixed connection, the both ends of guide pillar (403) respectively with guide pillar fixed plate (404) and mechanism mounting panel (401) fixed connection, movable block (414) and cylinder (412) fixed connection, right connecting rod (402) and left connecting rod (413) simultaneously with movable block (414) swing joint, the other end of right connecting rod (402) and left connecting rod (413) respectively with right rocking arm (406) and left rocking arm (409) swing joint, the middle part and main part locating plate (405) swing joint of right rocking arm (406) and left rocking arm (409), right briquetting (407) and left briquetting (408) respectively with right rocking arm (406) and left rocking arm (409) fixed connection, supporting block (410) and cylinder fixed plate (411) fixed connection.
2. The frame rail reverse deformation welding jig of claim 1, wherein: the fixed clamping mechanism (2) comprises a base (201), a supporting block (202), a pressing block (203), a rocker arm (204), a connecting rod (205) and a cylinder (206); the base (201) is fixedly connected with the clamp base (1), the rocker arm (204) is movably connected with the base (201), the supporting block (202) is fixedly connected with the base (201), the pressing block (203) is fixedly connected with the rocker arm (204), the air cylinder (206) is movably connected with the rocker arm (204), and the connecting rod (205) is simultaneously movably connected with the rocker arm (204) and the air cylinder (206).
3. A method of using a frame rail reverse deformation welding jig according to any one of claims 1-2, wherein: the frame longitudinal beam is positioned and clamped by a fixed clamping mechanism (2); the two ends of the longitudinal beam are clamped by the compression cylinder of the stretching and clamping mechanism (3), and the longitudinal beam is pulled down to a required position by the stretching cylinder according to the reverse deformation; the side pressure clamping mechanism (4) is used for fixing and clamping the longitudinal beam at the reverse deformation position;
after the welding of the longitudinal beam is finished, firstly, the side pressure clamping mechanism (4) is opened, then the stretching cylinder of the stretching clamping mechanism (3) is opened, then the clamping cylinder is opened, and finally the fixed clamping mechanism (2) is opened; the height difference of the longitudinal beams is utilized as the base height compensating table (5) to compensate the height difference of the longitudinal beams.
4. A method of using a frame rail reverse deformation welding jig according to claim 3, wherein: the supporting block (202) is used for supporting the longitudinal beam, and when the piston rod of the air cylinder (206) moves back and forth, the rocker arm (204) and the connecting rod (205) are driven to rotate simultaneously, so that the compression and the opening of the rocker arm (204) are realized.
5. The method of using a frame rail reverse deformation welding jig of claim 4, wherein: when the stretching mechanism of the stretching clamping mechanism (3) moves back and forth through a piston rod of the stretching cylinder (314), the clamping mechanism is integrally pulled down or jacked up, the guide post (313) ensures that the clamping mechanism moves linearly, and the stretching position of the clamping mechanism is adjusted by the upper limiting block (311) and the lower limiting block (312).
6. The method of using a frame rail reverse deformation welding jig of claim 5, wherein: when the side pressure clamping mechanism (4) is used: when a piston rod of the air cylinder (412) moves back and forth, the movable block (414) is driven to move up and down, so that the right connecting rod (402) and the left connecting rod (413) move along with the movable block, and the movement of the right connecting rod (402) and the left connecting rod (413) drive the right rocker arm (406) and the left rocker arm (409) to rotate around the movable connection point of the rocker arm and the main body positioning plate (405), so that the opening and the clamping of the rocker arm are realized; the supporting blocks (410) are used for supporting the longitudinal beams, and the rocker arms are respectively used for enabling the pressing blocks to be closer to welding seams so as to facilitate welding, wherein the right rocker arm (406) and the left rocker arm (409) are used for enabling the pressing blocks to be closer to the welding seams.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010422876.0A CN111496402B (en) | 2020-05-19 | 2020-05-19 | Frame longitudinal beam reverse deformation welding fixture and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010422876.0A CN111496402B (en) | 2020-05-19 | 2020-05-19 | Frame longitudinal beam reverse deformation welding fixture and application method thereof |
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| CN111496402A CN111496402A (en) | 2020-08-07 |
| CN111496402B true CN111496402B (en) | 2023-08-08 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922598A (en) * | 2020-08-12 | 2020-11-13 | 山东管理学院 | Welding tool, welding system and method for frame connecting frame of light truck |
| CN112247384B (en) * | 2020-10-16 | 2022-04-26 | 中车山东机车车辆有限公司 | Reversible deformation device for welding long weld joint of web of side beam of flat-bulb steel and welding method |
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| CN107378345A (en) * | 2017-08-18 | 2017-11-24 | 中车长春轨道客车股份有限公司 | Quick group of bogie cant board is to positioning tool |
| CN207746608U (en) * | 2017-12-12 | 2018-08-21 | 江苏大德重工股份有限公司 | Reversible deformation welding tooling |
| CN108188632A (en) * | 2018-01-03 | 2018-06-22 | 中车青岛四方机车车辆股份有限公司 | A kind of welding tooling of lateral beam of bogie |
| CN108393628A (en) * | 2018-01-30 | 2018-08-14 | 武汉冶钢结构有限责任公司 | A kind of improved bridge unit piece welding anti-distortion device and application method |
| CN109290707A (en) * | 2018-11-07 | 2019-02-01 | 江铃汽车股份有限公司 | Welder |
| CN109676299A (en) * | 2019-02-26 | 2019-04-26 | 湖南联诚轨道装备有限公司 | A kind of underground railway track vehicle sleeper beam general welding fixture and its welding method |
| CN209647928U (en) * | 2019-02-26 | 2019-11-19 | 湖南联诚轨道装备有限公司 | A kind of underground railway track vehicle sleeper beam general welding fixture |
| CN109773394A (en) * | 2019-03-26 | 2019-05-21 | 江铃汽车股份有限公司 | A kind of automobile appearance part fixture support device |
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| CN111496402A (en) | 2020-08-07 |
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